Answer:
A = 57 degrees.
b = 19.42.
a = 16.35.
Step-by-step explanation:
A = 180 - (38 + 85) = 57 degrees.
Law of sines:
a / sin A = b / sin B = c / sin C. So:
12 / sin 38 = b / sin 85
b = 12 sin 85 / sin 38
= 19.42
a / sin 57 = 12 / sin 38
a = 12 * sin 57 / sin 38
a = 16.35.
